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Regents Exam Questions A2.A.74: Using Trigonometry to Find Area 1
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Name: __________________________________
A2.A.74: Using Trigonometry to Find Area: Determine the area of a triangle or a
parallelogram, given the measure of two sides and the included angle
1 Jack is planting a triangular rose garden. The lengths of two sides of the plot are 8 feet
and 12 feet, and the angle between them is 87°. Which expression could be used to find
the area of this garden?
1)
2)
3)
4)
2 If the vertex angle of an isosceles triangle measures 30º and each leg measures 4, the area
of the triangle is
1)
2) 8
3)
4) 4
3 The vertex angle of isosceles triangle ABC measures 30º, and each leg has length 20.
What is the area of
?
1) 100
2)
3)
4) 200
4 In
1) 1
2) 2
3)
4) 4
,
,
, and
. The area of
5 In
is
1)
2)
3)
4)
, side a is twice as long as side b and
is
. In terms of b, the area of
6 The sides of a triangle measure 6 and 8, and the measure of the included angle is 150º.
The area of the triangle is
1)
2) 24
3)
4) 12
Regents Exam Questions A2.A.74: Using Trigonometry to Find Area 1
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Name: __________________________________
7 If
1) 15
2) 30
3)
4)
,
, and
8 In isosceles triangle ABC,
1)
, what is the area of
,
?
, and
. The area of the triangle is
2)
3)
4)
9 In
,
1) 18
2) 36
3)
4)
10 In
1)
2)
3)
4)
,
6
8
3
4
,
, and
and
. What is the area of
?
. If the area of the triangle is 12, what is the length of side b?
Regents Exam Questions A2.A.74: Using Trigonometry to Find Area 1
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6
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ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
4
4
1
2
2
4
3
3
3
1
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
2
2
2
2
2
2
2
2
2
2
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
REF:
060704b
010127siii
089326siii
089917siii
069729siii
088623siii
089623siii
089833siii
019835siii
080120siii